SOP - TEMPERATURE AND RELATIVE HUMIDITY MONITORING
1.0 PURPOSE: To provide a written procedure for usage and maintenance of wet and dry bulb Hygrometer & to provide a schedule and acceptance criteria for Temperature & Relative humidity (RH) recorded in controlled areas. 2.0 SCOPE: Applicable to all wet and dry bulb hygrometers used for checking temperature and relative humidity in controlled areas within Factory premises. 3.0 RESPONSIBILITY: Concerned Departmental Executives and Departmental Heads. 4.0 ACCOUNTABILITY: Plant Manager and Manager Quality Assurance 5.0 DEFINITIONS: Nil. 6.0 PROCEDURE: 6.1 PREPARATION OF THE INSTRUMENT: 6.1.1 Check and ensure that the wick is fixed on the wet bulb hygrometer. 6.1.2 Fill the cistern with potable water at the start of the shift. 6.1.3 Check and ensure that the wick is wet. 6.1.4 Check the mercury columns of the thermometer for any break in the column before taking to the area to be monitored 6.2 OPERATION: 6.2.1 Remove the hygrometer from the pouch and rotate gently for 50 to 60 times...